The Newton screen had 93.1% sensitivity and 93.5% specificity for cannabis use disorder in adolescents presenting to pediatric emergency departments, making it a practical brief screening tool.
Pediatric emergency physicians, adolescent medicine specialists, and public health screening programs.
93% sensitivity and specificity
What the researchers found
For cannabis use disorder, the Newton screen achieved baseline sensitivity of 93.1% and specificity of 93.5%. For alcohol use disorder, sensitivity was 78.3% with 93.0% specificity. Predictive validity at 1-3 year follow-up showed high specificity but lower sensitivity for both substances.
Why it matters
Emergency departments see adolescents who might not otherwise encounter substance use screening. A brief, validated tool that works in the chaotic ED environment could identify at-risk teens and connect them with early intervention.
The numbers in context
4,898 adolescents across 16 EDs; cannabis screening sensitivity 93.1%, specificity 93.5%; alcohol screening sensitivity 78.3%, specificity 93.0%; predictive validity maintained high specificity at 1-3 year follow-up.
How the study worked
Validation study within 16 pediatric emergency departments (PECARN network) enrolling 4,898 adolescents aged 12-17. Concurrent validity assessed against structured DSM-based interviews. Convergent validity tested against AUDIT. Predictive validity assessed at 1, 2, and 3 years.
What this study cannot tell us
Higher sensitivity for cannabis than alcohol may reflect the tool's design or differences in adolescent substance use patterns. Predictive sensitivity was lower at follow-up, suggesting it may miss some who develop problems later. ED populations may differ from general adolescent populations.
How to read the evidence
Moderate: large multi-site validation study with follow-up, though limited to ED populations.
When this study was published
Published in 2019.
The bigger picture
Brief screening tools are only useful if they are accurate and practical. The Newton screen's strong performance for cannabis, especially the high sensitivity that catches most true cases, addresses a real clinical need in pediatric emergency settings.
Questions still open
- Could this tool be adapted for primary care settings? Does early identification through ED screening translate to better substance use outcomes?
Common questions
What is the Newton screen?
Is the tool better at detecting cannabis or alcohol problems?
Read the original research
Reliability and Validity of the Newton Screen for Alcohol and Cannabis Misuse in a Pediatric Emergency Department Sample.
The Journal of pediatrics, 210, 154-160.e1
Citation
Linakis, James G; Bromberg, Julie R; Casper, T Charles; Chun, Thomas H; Mello, Michael J; Ingebretsen, Hailey; Spirito, Anthony. (2019). Reliability and Validity of the Newton Screen for Alcohol and Cannabis Misuse in a Pediatric Emergency Department Sample.. The Journal of pediatrics, 210, 154-160.e1. https://doi.org/10.1016/j.jpeds.2019.02.038
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